Lean Misfires at 2700-2800 rpm - Page 25 - 3000GT/Stealth International Message Center

DoctorDex · 04-06-2007, 10:13 PM

Yeah you're right.

I've tried unplugging it and its made no difference.

badass3000 · 04-07-2007, 01:56 PM

what about your RPM wire that goes to your fuel controller?
are you using the Ing wire 101 white wire or...
CAS wire 69 blue w/ stripe?

DoctorDex · 04-07-2007, 04:11 PM

Quote:

Originally Posted by badass3000

what about your RPM wire that goes to your fuel controller?
are you using the Ing wire 101 white wire or...
CAS wire 69 blue w/ stripe?

For the MAFTranslator I'm not using the rpm wire. For the SAFC-2 I'm using 101.

badass3000 · 04-07-2007, 07:16 PM

try wire 69?

J-Ville VR-4 · 04-08-2007, 12:45 PM

Quote:

Originally Posted by badass3000

try wire 69?

Or maybe wire 68 (blue w/ red stripe), the tdc sensor (also built into the cas on 1st gens). I believe they both ultimately send out the same signal?

DoctorDex · 04-08-2007, 02:53 PM

I tackled the issue of my TPS today.

Turns out there's nothing wrong with the TPS, as per manual. Whatever it is that supplies voltage to the TPS is bad. I measured the voltage that the TPS is seeing and all its receiving is 1.1 Volts. It should be seeing ~ 5 Volts. This is also explains why the MAP sensor wired into the EGRT input, which is using the TPS as a voltage source, doesn't work. I tried disconnecting the newly wired in MAP sensor and it had no effect.

TurboBob · 04-11-2007, 10:31 PM

bad ECU....?

BTW, I had a thought about the stumbling.... The plugs wires run right past the CAS........

Oh, and MSD wires suck..

Bob

DoctorDex · 04-12-2007, 07:29 AM

Quote:

Originally Posted by TurboBob

bad ECU....?
BTW, I had a thought about the stumbling.... The plugs wires run right past the CAS........

I'm 99% sure my ECU is fried so I'm actively looking for another one. However, they seem to be harder to find than I thought. I thought the plug wires running past the CAS (when I was running Accel thundersport? wires), so I switched back to my NGK resistors and it didn't make a difference.

Quote:

Originally Posted by TurboBob

Oh, and MSD wires suck..

So you don't recommend installing them?

J-Ville VR-4 · 04-12-2007, 11:44 AM

Quote:

Originally Posted by TurboBob

Oh, and MSD wires suck..
Bob

I'm curious as to your reasoning behind this statement. I'm not doubting you, I'd just like an explanation of why. I know they are really low resistance wires, I'm assuming that you are going to say that they put out a lot of EMI?
I had a set of magnecor's and swapped them out for msds awhile back. I havent noticed a difference between the two at all (I didnt expect any either). I dont have this hesitation problem that this thread is all about, btw, I'm just following along with the thread.

badass3000 · 04-13-2007, 03:23 PM

Quote:

Originally Posted by TurboBob

bad ECU....?

BTW, I had a thought about the stumbling.... The plugs wires run right past the CAS........

Bob

mine dont, I have the coils mounted on the tranny.
Bob, since my CAS is adjustable (and maxed out

) should I be able to get the same RPM signal that comes from the ignitor?
The car starts using the CAS signal but bounce revs and wont throttle up.

04-06-2007, 10:13 PM	#241 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 - RIP Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm Yeah you're right. I've tried unplugging it and its made no difference. __________________ '91 VR4 - Modlist: DR650R turbos, Snow stage 2D alky kit, DSM SMICs, blowthrough ported LT1 MAS, Dejon Tool intakes & y-pipe, Blitz DSBC Spec R, HKS SSQV BOV, PTE 580cc injectors, Dual feed fuel system with Aeromotive FPR & filter, Hotwired Supra pump, HKS DLI, MSD Wires, Apex'i S-AFC II, MAFTranslator, Turbobob ECU, Scanmaster III, LC-1 WBO2, ESP downpipe, Vac/EGR delete, Gutted precats and test pipe, Maximal solid mounts, 300m 18 spline output shaft, Centerforce Dual Friction clutch, RPS flywheel, GC coilover conversions with helper springs, Powerslot slotted rotors, Goodridge SS brake lines, Hawk pads (front), Stillen metal matrix pads (rear)

04-07-2007, 01:56 PM	#242 (permalink)
badass3000 Wanted: Traction Problems Join Date: Nov 2002 Location: Jacksonville, Fl Drives: 18 Y.O. "badass" VR4 Trader Rating: (19)	Re: Lean Misfires at 2700-2800 rpm what about your RPM wire that goes to your fuel controller? are you using the Ing wire 101 white wire or... CAS wire 69 blue w/ stripe?

04-07-2007, 07:16 PM	#244 (permalink)
badass3000 Wanted: Traction Problems Join Date: Nov 2002 Location: Jacksonville, Fl Drives: 18 Y.O. "badass" VR4 Trader Rating: (19)	Re: Lean Misfires at 2700-2800 rpm try wire 69?

04-08-2007, 02:53 PM	#246 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 - RIP Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm I tackled the issue of my TPS today. Turns out there's nothing wrong with the TPS, as per manual. Whatever it is that supplies voltage to the TPS is bad. I measured the voltage that the TPS is seeing and all its receiving is 1.1 Volts. It should be seeing ~ 5 Volts. This is also explains why the MAP sensor wired into the EGRT input, which is using the TPS as a voltage source, doesn't work. I tried disconnecting the newly wired in MAP sensor and it had no effect. Last edited by DoctorDex : 04-08-2007 at 10:14 PM.

04-11-2007, 10:31 PM	#247 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm bad ECU....? BTW, I had a thought about the stumbling.... The plugs wires run right past the CAS........ Oh, and MSD wires suck.. Bob __________________ Need a datalogger? Check out the Scanmaster 3 PM me about ECU mods for 8000+ RPM rev limits !!!!!!!! Stock = 7300 RPM Stage 1 = 8060 RPM Stage 2 = 8200 RPM Stage 3 = 8400 RPM Stage 4 = 8800 RPM (By request only) 1991 Stealth RT/TT, Grooms Shortblock, 13G's, Translator Pro, www.maftpro.com

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